(CNN) - Conservative advocacy group Americans for Prosperity's anti-Obamacare efforts have now topped $7.6 million in spending over the last few weeks with Thursday's announcement of a new $1.7 million ad buy.

According to a release, the ad buy marks the group's third wave of TV, radio and web ads going after the Affordable Care Act, better known as Obamacare. As the ads have done in the past, the new round will applaud lawmakers who've opposed the law and blast those who've supported it.FULL POST

The CNN 100 takes a look at the top 100 House races, from now until Election Day.

Editor's Note: In the final 100 days before Election Day, CNN has been profiling one race at random each day from among the nation's top 100 House races, which we've dubbed "The CNN 100." Read the full list here. Today's featured district is:

Though not among the most vulnerable House incumbents this year, Rep. Ann Kirkpatrick nonetheless finds herself in the unenviable position of being a freshman Democrat in a Republican district during an election cycle that historically has not been kind to the party controlling Congress.